So far so good. After the first mission I wasn't really sure what to do with myself. I walked onto my neighbor's lawn and they did not care for that, so then I got into a fist fight with two guys. Then other guys started lining up and waiting their turn to fist fight me. So then the cops showed up and I took off. Eventually I stole a station wagon and hid in a giant storm drain. Lesson learned. I'm not going to walk onto my neighbor's lawn again.
I got it at midnight and played for a few hours, mostly free roaming. The city is enormous and beautiful. The couple of missions I played were already pretty awesome and the controls/mechanics of combat and driving feel really good.